The Billabong Intruder Junior 4/3mm wetsuit is an affordable option that benefits from Billabong's expertise in surf suits. It features a durable outer fabric, a blend of nylon and Superflex neoprene, which makes it surprisingly comfortable for a wetsuit in this price range, as they've used highly elastic neoprene in key areas, namely under the arms and at the shoulders.
It's a wetsuit with an incredible price-to-quality ratio, with flat seams. It's very easy to put on, thanks to its YKK back zipper.